白鱀豚能量需求模型

ENERGY REQUIREMENT MODELS OF THE BAIJI, Lipotes vexillifer

分析了１头雄性白豚（Ｌｉｐｏｔｅｓｖｅｘｉｌｉｆｅｒ）１５ａ的饲养记录，建立了该豚日能需求模型，即ＤＥＲ（Ｃ）＝９．８６０ｌｎ（Ａ）＋１０．４３３（Ｒ２＝０．９４７２）。参考其他海洋哺乳动物能量学资料，估算出白豚身体能量密度、基础代谢率、运动耗能和体温调节耗能。建立了野生白豚雌、雄个体日能量需求模型，即ＤＥＲ（Ｆ）＝１０．８４８ｌｎ（Ａ）＋８．１２６（Ｒ２＝０．９８３４）；ＤＥＲ（Ｍ）＝７．０８３ｌｎ（Ａ）＋１２．５８６（Ｒ２＝０．９９３２）。雄性豢养个体早期的日能需求与野生个体相近，但随着豢养时间的延长，豢养个体的日能需求呈下降趋势，年下降率约为０．４０１２ＭＪ／ｄ。

The past 15 year feeding records of one male Baiji was analyzed and a daily energy requirement moldel for the Baiji's early rearing years was set to be: DER(C) =9 860ln( A )+10.433( R 2 =0.9472).The energy density of carcass,basal metabolic rate, cost of locomotion,and cost of thermoregulation of the Baiji were estimated based on the energetics of other marine mamals. The two models for the Baiji's daily energy requirement in wild were developed. One was for the female: DER(F) =10 848ln( A )+8 126( R 2 =0 9834) and the other one was for the male: DER(M) =7 083ln( A )+12 586( R 2 =0 9932).The daily energy requirement of the male baiji in the early rearing years was similar to that of the male in wild. With the extension of the rearing years,the daily energy requirement of the male Baiji in captivity was to be a dropping tendency with a yearly dropping rate of 0.4012 MJ/d.